>v^ArTlLlD.E. 
335 
was derived from the “ Terrain Xummulitique ” of the Montagne 
Noire (Aude). 
Horizon. Eocene. 
Locality. Mokattam escarpment, near Cairo. 
Represented in the Collection by a specimen presented by Sir R. 
Owen, K.C.B. 
Genus ATURIA, Broun h 
{Nautilus, J. Sowerbv, 1812^; Nautilus, Basterot, 1825®; Aganides, 
d’Orbignv, 1825 ^ ; Ammonites, Van Mens, 1834 ® ; Nautilus, v. Buch, 
18.34 ° ; Aganites (pars), Qiienstedt, 1840 ; Aganides, Pictet, 1845 ® ; 
Clymenia, Michelotti, 1847 ® ; Nautilus, Sismonda, 1847 ; Aganites 
(pars), Qiienstedt, 1849 ; Clymenia?, Dixon, 1850 Nautilus, Sae- 
mann, 1852^®; Megasiphonia, d’Orbigny, 1852^^; Nautilus, Morris, 
1854^®; Nautilus, Schafhautl, 1863 Fuchs, 1876 ; Nau- 
tilus, Abich, 1882 '^) 
Gen. Char. Aturia was thus briefly defined by Broun in the 2nd 
edition of the ‘Lethaea Geognostica’ (Band ii. 1838, p. 1123) : — “ The 
siphuncle subcentral [z. e. subdorsal] ; the septa with a deep, narrow, 
^ Lethasa Geognostica, Band ii. 1838, pp. 1122, 1123. The nscnxQ Aturia 
{Aturus or Adurus of the Romans) is derived from that of the River Adour 
(Landes, France), which, in its turn, is taken from the radical Celtic dour, 
water. 
Min. Conch, vol. i. p. 12. 
® Descr. Geol. du Bas.sin Tertiaire du Sud-ouest de la France, pt. i., Mem. de 
la Soc. d’Hist. Nat. de Paris, p. 17. 
^ Tabl. des Cephalopodes, p. 71. 
® Bull, de I’Acad. de Bruxelles, vol. i. p. 113. 
® Neues Jahrbuch fur Min. &c. p. 534. Ibid. p. 289. 
® Traite de Paleontologie, vol. ii. p. 341. 
® Descr. des Foss, des Terr. Miocenes de iTtalie Septentrionale, p. 349. 
Ibid. p. 346. 
Die Cephalopoden, p. 58. 
Geology and Fossils of the Tertiary and Cretaceous Formations of Sussex, 
pp. 1 10, 194. 
'® Palaeontographica, Band iii. Lief. iii. p. 141. 
Prodr. de Paleont. Stratigr. vol. iii. p. 25. 
Cat. of British Fossils, 2nd ed. p. 306. 
Siid-Bayerns Leth. Geogn. pp. 217, 281. 
Sitzungsber. d. k. Akad. d. Wissensch., math.-naturwiss. Classe, Band Ixxiii. 
p. 68. 
Geologie des Armenischen Hochlandes, p. 298. 
